When something’s messing with your HVAC system, one of the first places to check is your thermostat. Many models have a digital display that will display a specific numerical error code. This error code can be used to help determine the problem and streamline the troubleshooting and repair process for HVAC systems like your furnace.
This is even easier with smart thermostats like the Lennox iComfort model. Let’s review three serious error codes—411, 225 and 31—to learn what the problem is. We’ll also share what steps your technician will take to fix the problem, and the potential costs to do so.
Solved: iComfort Error Code 411
Error code 411 is an urgent priority to take care of. You’ll see this error code appear when the outdoor unit’s low-pressure switch malfunctions five times or more across one heating or cooling cycle. Since this error code includes the outdoor unit, it may be involved with your air conditioner. Each time the low-pressure switch opens incorrectly, the error count increases. Once it passes five strikes, the thermostat immediately turns down the outdoor unit. This is known as a lockout and is a safety feature intended to prevent damage.
Fixing the Problem
A technician will test the system charge using several methods, as the issue may be with the switch’s power connections rather than the low-pressure switch itself. Once the cause has been found, technicians will reset the outdoor unit by placing it in test mode or by resetting low-voltage power. Once the issue is resolved, the error code should automatically disappear.
Estimated Repair Cost
Replacing a low-pressure shutoff switch can depend on the specific model of your outdoor unit. You may expect to pay between $200 to more than $600 depending on parts and air conditioning repair costs. The shutoff switch itself runs an average of $30 to $150.
Lennox Thermostat iComfort Error Code 225
Error code 225 is specific to your f